Three Tibetans and a 60-year-old Australian tourist died in an avalanche on Mount Everest this week.

Xinhua News Agency reported Wednesday that a group of 10 — four tourists, three herders, two cooks, and a tour guide — encountered an avalanche that stranded 154 people who traveled to an off-limits area Sunday, in a trip organized by a local tourist agency.

Local officials say the Australian died after a rescue effort due to altitude sickness, age, and other health issues.